Traceback

class (source)

Sequence of Frame instances sorted from the oldest frame
to the most recent frame.

Changed in 3.7, 3.9

3.7: Frames are now sorted from the oldest to the most recent, instead of most recent to oldest.
3.9: The Traceback.total_nframe attribute was added.

total_nframe: Total number of frames that composed the traceback before truncation.